Parametric separation of symmetric pure quantum states

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dc.creatorMiguel Ángel Solís Prosser
dc.creatorAldo Patricio Delgado Hidalgo
dc.creatorOmar Alejandro Jiménez Henríquez
dc.creatorLeonardo Teixeira Neves
dc.date.accessioned2025-02-23T16:43:49Z
dc.date.accessioned2025-09-08T23:07:03Z
dc.date.available2025-02-23T16:43:49Z
dc.date.issued2016
dc.identifier.doihttps://doi.org/10.1103/PhysRevA.93.012337
dc.identifier.issn2469-9934
dc.identifier.urihttps://hdl.handle.net/1843/80330
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofPhysical Review A
dc.rightsAcesso Restrito
dc.subjectTomografia quântica
dc.subject.otherQuantum state transfer
dc.subject.otherQuantum tomography
dc.titleParametric separation of symmetric pure quantum states
dc.typeArtigo de periódico
local.citation.issue1
local.citation.volume93
local.description.resumoQuantum state separation is a probabilistic map that transforms a given set of pure states into another set of more distinguishable ones. Here we investigate such a map acting onto uniparametric families of symmetric linearly dependent or independent quantum states. We obtained analytical solutions for the success probability of the maps—which is shown to be optimal—as well as explicit constructions in terms of positive operator valued measures. Our results can be used for state discrimination strategies interpolating continuously between minimum-error and unambiguous (or maximum-confidence) discrimination, which, in turn, have many applications in quantum information protocols. As an example, we show that quantum teleportation through a nonmaximally entangled quantum channel can be accomplished with higher probability than the one provided by unambiguous (or maximum-confidence) discrimination and with higher fidelity than the one achievable by minimum-error discrimination. Finally, an optical network is proposed for implementing parametric state separation.
local.identifier.orcidhttps://orcid.org/0000-0002-2856-441X
local.identifier.orcidhttps://orcid.org/0000-0002-8968-5733
local.identifier.orcidhttps://orcid.org/0009-0000-4557-9472
local.identifier.orcidhttps://orcid.org/0000-0002-9589-1939
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.initialsUFMG
local.url.externahttps://journals.aps.org/pra/abstract/10.1103/PhysRevA.93.012337

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